How to get Gatekeeper on High Sierra to remember decisions?

OK, false alarm.

In the best tradition of compsci I deleted it, re-downloaded it and installed it again. This time I was asked if I wanted to open it, said yes and it looks like that decision has been remembered. 🙂

Yep, it probably is (Sublime Text editor) but previously there was a way of effectively saying "yes, I know this is from an unidentified developer, but I would like to open it anyway" and that decision would be remembered. You had to enter your admin pwd etc.

I have the same app & the same Gatekeeper settings on my previous laptop (also 10.13.6) but I don't get the constant "do you want to open" question as my decision to whitelist this app had been recorded long before updating to High Sierra.